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Method and device for establishing label switching path of virtual private network

A label switching path and virtual private network technology, applied in the field of network communication, can solve problems such as packet loss, achieve the effect of improving service quality, good experience, and reducing data packet loss

Active Publication Date: 2015-01-21
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the BFD detection mechanism can achieve the tangent time of using FRR (that is, switching from the primary path to the standby path) within 50ms, but after PE2 restarts, the FRR switchback (that is, switching back to the primary path from the standby path) will fail. There is packet loss

Method used

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  • Method and device for establishing label switching path of virtual private network
  • Method and device for establishing label switching path of virtual private network
  • Method and device for establishing label switching path of virtual private network

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Embodiment Construction

[0042] In order to make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] One of the core concepts of the embodiments of the present invention is that the source PE configures the IP address of the loopback port of the target PE, and when the source PE receives the label information sent by the target PE, it extracts the target IP address from the label information. The loopback port IP address of the PE. If the locally configured loopback port IP address is consistent with the loopback port IP address carried in the label information, it is determined that the LSP from the source PE to the target PE is available to prevent traffic from being blocked. The problem.

[0044]refer to figure 2 , shows a flow chart of the steps of Embodiment 1 of a me...

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Abstract

The embodiment of the invention provides a method and a device for establishing a label switching path of a virtual private network VPN. The virtual private network VPN comprises a source provider edge PE and a target provider edge PE. The method comprises the following steps: the source PE configures a first loopback interface IP address of the target PE; when receiving label information sent by the target PE, the source PE extracts a second loopback interface IP address of the target PE from the label information; and if the first loopback interface IP address is consistent with the second loopback interface IP address, that a label switching path LSP from the source PE to the target PE is available is determined. According to the embodiment of the invention, the problem of traffic blocking can be prevented. The LSP from the source PE to the target PE can be established in a timely manner, so that data packet loss can be reduced to the maximum, the problem of traffic blocking is prevented, better experience is offered to users, and the service quality of a service provider network is improved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for establishing a label switching path of a virtual private network (VPN). Background technique [0002] With the development of network technology, VPN (Virtual Private Network, virtual private network) is more and more popular, and MPLS (Multiprotocol Label Switching, multi-protocol label switching) VPN has good scalability and high flexibility It is one of the rapidly developing VPN technologies at present. However, in the process of forwarding VPN packets, due to the unreliability of the network, any node or link failure will lead to service interruption. In order to improve the reliability of the network, path redundancy protection is often used. [0003] refer to figure 1 A network distribution diagram of a virtual private network is shown, the virtual private network includes CE (Customer Edge, user network edge device), PE (Provider Ed...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/46H04L45/50
Inventor 周建华王超群汪亮
Owner NEW H3C TECH CO LTD
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